Method of preparing metal strip



- June 8, 1937. 1; LQRIG 2,083,518

METHOD OF PREEARING METAL STRIP Filed June 8, 1934 3 Sheets-Sheet 1- lllllllllll llllillllllllllilllii Mth 'EDW/N 7. LOB/6 June 8, 1937. I T, L R 2,083,518

METHOD OF PREPARING METAL STRIP Filed June 8, 1954 s SheetJs-Sheet 2 hwenlor: 'EDW/N 7. Lee/ June 8, 1937. E. T. LORIG METHOD OF PREPARING METAL STRIP Filed June 8, 1934 3 Sheets-Sheet 3 EDW/N 7T LOB/6, h"

Patented June 8, 1937 UNITED STATES PATENT OFFICE METHOD OF PREPARING METAL s'rmr New Jersey Application June 8, 1934, Serial No. 729,651

4 Claims.

This invention relates to an improved method of preparing metal strip prior to immersing the same in a liquid, such as a pickling solution, although not limited thereto.

It has been the practice in the past to remove hot mill scale, and other impurities, from long lengths of metal strip by continuously pickling the same prior to subsequent processing operations, such as cold reducing. One way of accomplishing this was by coiling the strip as it comes from the hot mill, transferring it to a remote part of the mill, uncoiling it, and slowly running it as a single length through an extremely long shallow tank filled with pickling acid.

The pickled strip was then run slowly through an extremely long rinsing tank, after which it was dried and recoiled. Such a procedure necessitates not only a high initial equipment cost, but

the apparatus necessarily occupies a large area of floor space. Coils of metal strip of this type often weigh several tons and are from one to nine hundred feet in length, the Width being considerably above thirty inches.

Their transportation is necessarily a troublesome matter, and the cost of pickling, rinsing, drying and recoiling the same is very great. It has been proposed to pickle small coils of strip, which weigh only a few hundred pounds, by inserting spacer pins between the convolutions thereof and to immerse them as a unit into the pickling acid. This method has however, not met with much success, due to the fact that the spacer pins often dropped out, thus permitting adjacent convolutions of the metal strip to make contact, causing pickle stains or black spots. In addition, these spacer pins often dropped between the convolutions further toward the middle of the coil and affected the surface of the metal by marks and dents. Even if these spacer pins were attached in such manner as not to drop between the convolutions of the coiled strip, they leave stains or marks where they make contact with the metal, due to the fact that they must be of considerable length in order to be of any value.

One object of the present invention is the provision of a novel method of preparing metal strip in such manner as to permit its uniform and economical pickling, thus doing away with expensive pickling equipment which occupies large areas of floor space.

Another object is the provision of a novel method of the class described which entirely eliminates the use of spacer pins, thus avoiding stains, unpickled areas, and surface defects, as previously mentioned.

A further object is the provision of a novel method of preparing metal strip in such manner as to permit its being coiled and efficiently pickled in existing types of small pickling vats, such as are now being used for pickling sheet metal In short lengths.

' These and still further objects will be apparent after referring to the drawings, in which:

Figure 1 is a plan of the apparatus of the invention.

Figure 2 is an elevation of the apparatus of Figure 1.

Figure :3 is an end elevation.

Figure 4' is an enlarged fragmentary elevation of a detail.

Figure 5 is an enlarged perspective of one of the novel corrugated rolls of the invention.

Figure 6 is a perspective view of the article obtained by the use of the novel apparatus.

Referring more particularly to the drawings, the numeral 2 designates a bedon which the apparatusofthe invention is mounted. Roll housings 3 are disposed upon the bed 2 and provided with the usual bearing apertures 4. An upper and lower bearing assembly 5 and 6, respectively, is disposed in each of the bearing apertures 4. A top plate I is mounted on top of each side of each housing 3, and each plate provided with a cage 8 in which there is disposed a spring 9. An adjusting screw I0 is screw-threaded in each of the cages 8 for adjustably compressing the spring 9 to maintain the bearing assemblies 5 and 6 in the proper resilient relationship. A roll I2 having necks I3 is provided with an enlarged central body portion 14 which is corrugated in such manner as to provide protuberances [5 which taper, as at 16, toward its center. Between the various protuberances l5 there are indentations I! which taper inwardly toward the center of the roll, as at I8. The various protuberances and indentations l5 and I1, respectively, are alternately opposed on each of the edges of the body M of the roll l2, which has its necks l3 journaled in the upper bearing assemblies 5.

A roll 20 is provided with necks 2| which are antifrictionally journaled in the lower bearing assembliesv B in the bearing apertures 4 of the housings 3. The roll 20 is provided with an enlarged central body portion 22 having protuberances 23 on its surface which are identical with the protuberances IS on the body portion [4 of the roll l2. These protuberances 23 taper inwardly toward the center of the bodyv22, as

shown at 24. An indentation'between each ofthe protuberances 23 tapers toward the center of thebody'22, as shown at 25,. ;The protuberances 5 23 and indentations 25 on the' edges of the body 22 a're'alternately opposed with respect to each other. e

, A gear 28 1s secured to one of the necks'tlaof theupper rojll;l2 while the adjacent'neckjl of; the lower roll 20 is provided'with an extension p 29 to which there is secured a gear'3ll. *The gears l edges thereof, coiling saidstrip,'and maintaining 28 'and'30 are securedto thenecks l3 and 2|, respectively, in such manner .as'to provide l'forfi"; the'interlocking of their variousprotuberances V and indentations l5 and '23, and l ,and"25,,j,0f Q j the rolls l2 and,2 0 respectively. 'A gear 31 is also secured to the-extension 29 on the, neck 2lf A gear reduction unit 33- is mounted on the bed 2 adjacent the gear Stand- I is provided with a driven shaft to which there of the roll 20.

is secured a gear 35 which is in" mesh therewith;

A'm'otor 31-is mounted onthebed 2-andprovided 1 with the usual drive shaft 38iwhich is inalinement of a coupling 40., 1

q The strip to be prepared, which is indicated at l Aj'ispp assed between the bodies Hjand :22 of r the rolls i2 and;20, respective1y and 'is corru, gated in such manner .as to provide protuberances B which taper toward the center. thereofias c at the extreme'edges oflits adjacent convolution's in c'ontacti.=therebetween. 1.- Y

shown at C, while alternately disposed on either edge of the strip A indntationsDa're'formed' which taper inwardly as .at E1" These protuber-j ances and 'indentations' D and :11, respectively, p i T permitithe'strip A when: boiled to have its various convolutions'asseiribled in s uch manner as to" V 7 permit 7 only: the contact *ofithe indentations :;D

at both of its side ed es; thus' permitting. fre circulation of the pickling acid in jwhich the-coil is to be. immersed;-

.Due to. thevery small points of contact betweenits various convolutions, the coiled strip A a may be efliciently.and economicallyspickled'fin, V

r e'xistinggtypes of 's'mallpickling' vats' which'are; "both'inexpen'sive and;occupy but'small areas "of floor: space in the mill. f 1" While 1 haveshown-and' described: one specific embodimentof my invention, it will be understood that I do not wish'to be limited exactly thereto, since various modifications maybe made withoutdeparting from the scope of my invention, as

defined in the following claims;

Isclaim: 7 d =1.{Ihe method of V 'preparinga metal strip *for *o'nly' the raised sections at the extreme edges of r 7 adjacent-- convolutions in contact therebetween.

. Z The method of prepa'ringa metal'strip for subsequentjimmersionjin liquids which includes 'corrugating 1.substantial lengths of the same,

thereby producing alternate, and opposite proftuberancesand depressions, the protuberances on one side of said strip gradually approaching the depressions on'the other side thereof at substantially-the center of said strip, coiling said corruigatedstrip; and. maintaining only the. protuberlances-of adjacent convolutions in'contact.

V 3. Th e method of preparing ametali strip for subsequent immersion in liquimfwhich includes cOrrugating a substantial length of: the same,

7 subsequent immersion inl iquids which includes V -corrugatingsubstantial lengths of the same,

thereby producing raised sections at the extreme 10 thereby producing raised sections at the extreme edges thereof, saidcorrugatednwtalstrip-beings; undeformedaexcept for, said, corrugations ins af plane; transverse to itslongitudinal axis,j an'd; {301* coiling said, strip with only the raised sections;

' 4.gThe method of? preparing a metal strip for i I thereby, producing alternate and opposite proon one side ofs'aid-tripjradually approaching the depressions on the otheriside thereof at: sub? ,stantially ,the center; of said-strip, said corrugated Y metal stripybeing 'undeformed' exceptiorsaid corrugations in=a plane transverse toits longi- J l 'tu'dinal ;'axis;: and. c'oilingii said -.strip with onlyil Ethe; protuberances ofits adjacent convolutions 45 in contact. j Y 1 1 Y EDWIN T10R16 tuberances; andldepressions, the protuberances 

